Anisotropic rod theory is normally used to model slender rods or strips with a mild anisotropy of the cross section [1]} (i.e. \(L>>w \sim t\) ). Several recent studies have demonstrated its accuracy in predicting the nonlinear mechanics of strips with \(w/t\)  up to \( O(10)\)  [2]}, [3]}, [4]}. Throughout this study, we fix \(w/t\)  to 20 and use an anisotropic rod model to study creased annuli. The force and moment balances of an inextensible and unshearable rod can be summarized as
\(\begin{aligned}\mathbf {N}^{\prime } &=\mathbf {0} \,, \mathbf {M}^{\prime } +\mathbf {d_3} \times \mathbf {N} &=\mathbf {0} \,, \\\end{aligned}\) 
